Spark-arrester.



No. 737,799. I PATENTED SEPT. 1, 1903.

H. S. WAINWRIGHT.

SPARK ARRESTER.

APPLICATION FILED my 19. 1902. RENEWED AUG- s. 1903.

no MODEL.

witnesses Eventor m: uomus Pawns ca. FHOTO'UTHO WASNINGTON, n. c.

UNITED STATES IPatented September 1, 1903.

PATENT OFFICE.

HARRY SMITH- VVAINWVRIGHT, ()F ASHFORD, ENGLAND.

SPARK-ARRESTER.

SPECIFICATION forming part of Letters Patent No. 737,799, datedSeptember 1, 1903.

Application filed May 19, 1902. Renewed August 3, 1903. Serial No.168,124. (No model.)

To all whom, it may concern:

Be it known that I, HARRY SMITH WAIN- WRIGHT, a subject of the King ofGreat Britain and Ireland, residing at Ashford, in the county of Kent,England, have invented Improvements in Spark-Arresters, of which thefollowing is a specification.

This invention relates to spark-arresting devices forlocomotive-engines; and it consists of the improvements hereinafterdescribed and claimed.

The accompanying drawing shows in vertical section suflicient of thesmoke-box of a locomotive-engine and accessories to illustrate myinvention.

a is the smoke-box; Z), the top row of firetubes; 0, the bottom row offiretubes; d, the blast-pipe; e, the chimney-base, and f a horizontalgrid or grating above the top row of fire-tubes.

Between the upper end of the blast-pipe d and the chimney-base c andsupported by the blast-pipe there is arranged atube-like sparkarrestingstructure composed of a lower portion g of upwardly-increasing diameterand an upper portion 72 which is adapted to act as a chimney-cone and isrigidly connected to the lower portion g and decreases in diameterupwardly from its junction with the portion g, where it is equal indiameter to the portion 9 and is located in the grid or grating f, whichserves as a lateral extension with openings through it. The structure,which rests on a blower-ring i and is securedto the blast-pipe by boltsj, comprises a top ring 10, a bottom ring Z, an intermediate ring m,notched or recessed bent bars 72, secured to the said rings, and wire orrod 0 of circular cross -section arranged spirally around the bars a andin the notches or recesses thereof. The wire or rod is intended by itsspiral arrangement to cause escaping steam to whirl 0r revolve and sofacilitate its egress, and it also affords outwardly and upwardlyinclined external surfaces adapted to break up cinders and arrest orthrow down sparks and glowing particles. In lieu of rod or wire otherflexible metal material, as chain or wire rope, may be employed; but itshould afiord outwardly and upwardly inclined external surfaces adaptedto break up cinders and throw down sparks and glowing particles.

The blast-pipe is a short onei. 6., its discharge-orifice isconsiderably below the level of the top row of fire-tubes, which isfound to contribute to economy in coal consumption.

WVhat I claim is 1. In a locomotive-engine, the combination with ablast-pipe, of a sparlearresting structure comprising a lower portion ofupwardlyincreasing diameter and an upper portion of upwardly decreasingdiameter and rigidly connected to said lower portion, and an extensionhaving openings through it and projecting laterally from the junction oftwo said portions.

2. In a locomotive-engine, the combination with a blast-pipe, of aspark-arresting structure comprising a lower portion ofupwardlyincreasing diameter and an upper portion of upwardlydecreasingdiameter and rigidly connected to said lower portion, said structurebeing constructed of a framework comprising top and bottom rings andbent bars common to both of said portions and connecting said ringstogether, and metal material arranged around said framework andpresentin g outwardly and upwardly inclined external surfaces adapted tobreak up cinders and arrest or throw down sparks and glowing particles.

3. In a locomotive-engine, the combination with a blast-pipe, of aspark-arresting structure comprising a lower portion ofupwardlyincreasing diameter and an upper portion of upwardlydecreasingdiameter and rigidly connected to said lower portion, said structurebeing constructed of a framework comprising top and bottom rings andbent notched or recessed bars common to both of said portions andconnecting said top and bottom bars together, and metal materialarranged around said framework and located in the notches or recesses ofsaid bars.

4. In a locomotive-engine, the combination with a blast-pipe, of aspark-arresting structure comprising a lower portion ofupwardlyincreasing diameter and an upper portion of upwardlydecreasingdiameter and rigidly connected to said lower portion, said structurebeing constructed of a framework comprising top, bottom, andintermediate rings, notched or recessed bars connecting said ringstogether, and metal material arranged spirally ICO around said frameworkand located in the notches or recesses of said bars.

5. In a locomotive-engine, the combination with a blast-pipe, of aspark-arresting struc ture comprising a lower portion ofupwardlyincreasing diameter and an upper portion of upwardlydecreasingdiameter and rigidly connected to said lower portion, said structurebeing constructed of a framework comprising top, bottom, andintermediate rings, notched or recessed bars connecting said ringstogether and, in each of said portions, metal material arranged spirallyaround said framework and located in the notches or recesses of saidbars.

6. In a locomotive-engine, the combination with a blast-pipe, of aspark-arresting structure comprising a lower portion resting upon saidblast-pipe and of an upwardly-increas HARRY SMITH lVAINl/VRIGHT.

Vitnesses:

HORACE A. TILLINGHAST, ALEX. RIDGVVAY.

